Frequently Asked Questions Drug Test FAQ
The most common excuse for a positive marijuana test is, "I was around some people who were smoking pot." Research has shown that casual exposure to marijuana smoke will not produce a positive test. A person really has to work at being exposed to "passive" smoke to create a positive test. Very close confinement, without ventilation, with several smokers, for a period of over an hour, may result in a low, but measurable amount of marijuana in urine and blood.